update index.md (reports > statement) for multiple securities chart (rev 0.77.0)

Author: hug-sch

docs/en/reference/view/reports/statement/images/sb-reports-statement-chart.mp4

@@ -115,4 +115,12 @@ The current price is positioned at 75.83% of the interval between the highest an
 For this example:
 `(18.638 - 19.766) / (19.766 - 15.10) = -24.17%`
 
-The sum of the absolute values of both indices equals 100%.
+The sum of the absolute values of both indices equals 100%.
+
+## Multiple charts
+
+The information pane normally displays a chart of the security selected in the top pane. However, you can display multiple securities (see Figure 5). Use the `Shift` key to select adjacent securities, or `Ctrl` (`Cmd` on Mac) to select non-adjacent ones. Markers you have added via the :gear: `Configure Chart` icon - such as dividends, investments (buy, sell), etc. - are no longer displayed, in order to keep the chart clear.
+
+ Figure: Multiple charts in the information pane of the Statement of Assets view. {class=pp-figure}
+
+ ![](./images/sb-reports-statement-chart.mp4)